Congenital cyanosis due to methemoglobin reductase deficiency: first reported Tunisian case.

Nouv Rev Fr Hematol (1978)

Hôpital Aziza Othmana, Service d'Hématologie, Tunis, Tunisie.

Published: December 1989

During investigation of chronic cyanosis in a 25 year old male, after excluding pulmonary and cardiac causes, methemoglobinemia was suspected. Investigation of the activity of methemoglobin reductase clenched the diagnosis of homozygous cytochrome b5 reductase deficiency in a case of recessive congenital methemoglobin type I (absence of neurologic symptoms).

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